Gravity: BME688 AI Environmental Sensor (VOC, Temperature, Humidity, Pressure) - DFRobot

/*!
* @file DFRobot_BME68x_I2C.ino
* @brief connect bme68x I2C interface with your board (please reference board compatibility)
* @n Temprature, Humidity, pressure, altitude, calibrate altitude and gas resistance data will print on serial window.
*
* @copyright Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
* @license The MIT License (MIT)
* @author [Frank](jiehan.guo@dfrobot.com)
* @maintainer [GDuang](yonglei.ren@dfrobot.com)
* @version V2.0
* @date 2024-04-25
* @url https://github.com/DFRobot/DFRobot_BME68x
*/

#include "DFRobot_BME68x_I2C.h"
#include "Wire.h"

/*use an accurate altitude to calibrate sea level air pressure*/
#define CALIBRATE_PRESSURE

DFRobot_BME68x_I2C bme(0x77); //0x77 I2C address

float seaLevel;
void setup()
{
uint8_t rslt = 1;
Serial.begin(9600);
while(!Serial);
delay(5000);
Serial.println();
while(rslt != 0) {
rslt = bme.begin();
if(rslt != 0) {
Serial.println("bme begin failure");
delay(2000);
}
}
Serial.println("bme begin successful");
#ifdef CALIBRATE_PRESSURE
bme.startConvert();
delay(1000);
bme.update();
/*You can use an accurate altitude to calibrate sea level air pressure.
*And then use this calibrated sea level pressure as a reference to obtain the calibrated altitude.
*In this case,525.0m is chendu accurate altitude.
*/
seaLevel = bme.readSeaLevel(525.0);
Serial.print("seaLevel :");
Serial.println(seaLevel);
#endif

// At initialization, the default heating layer target temperature is 320 and the duration is 150ms
bool res = bme.setGasHeater(360, 100);

Serial.print("Set the target temperature of the heating layer and the heating time: ");
if(res == true){
Serial.println("set successful!");
}else{
Serial.println("set failure!");
}
}

void loop()
{
bme.setGasHeater(320, 100);
delay(30);
bme.startConvert();
delay(1000);
bme.update();
Serial.println();
Serial.print("temperature(C) :");
Serial.println(bme.readTemperature() / 100, 2);
Serial.print("pressure(Pa) :");
Serial.println(bme.readPressure());
Serial.print("humidity(%rh) :");
Serial.println(bme.readHumidity() / 1000, 2);
Serial.print("gas resistance(ohm) :");
Serial.println(bme.readGasResistance());
Serial.print("altitude(m) :");
Serial.println(bme.readAltitude());
#ifdef CALIBRATE_PRESSURE
Serial.print("calibrated altitude(m) :");
Serial.println(bme.readCalibratedAltitude(seaLevel));
#endif
}

/*!
* @file IAQ_I2C.ino
* @brief connect bme68x I2C interface with your board (please reference board compatibility)
* @n Temprature, Humidity, pressure, altitude, calibrated altitude, gas resistance and IAQ data will be printed via serial.
* @note This demo only support ESP8266 MCU
*
* @copyright Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
* @license The MIT License (MIT)
* @author [Frank](jiehan.guo@dfrobot.com)
* @maintainer [GDuang](yonglei.ren@dfrobot.com)
* @version V2.0
* @date 2024-04-25
* @url https://github.com/DFRobot/DFRobot_BME68x
*/

#include "DFRobot_BME68x_I2C.h"
#include "Wire.h"

/*use an accurate altitude to calibrate sea level air pressure*/
#define CALIBRATE_PRESSURE

DFRobot_BME68x_I2C bme(0x77); //0x77 I2C address


float seaLevel;
void setup()
{
uint8_t rslt = 1;
Serial.begin(115200);
while(!Serial);
delay(5000);
Serial.println();
while(rslt != 0) {
rslt = bme.begin();
if(rslt != 0) {
Serial.println("bme begin failure");
delay(2000);
}
}
Serial.println("bme begin successful");
bme.supportIAQ();

// At initialization, the default heating layer target temperature is 320 and the duration is 150ms
bool res = bme.setGasHeater(360, 100);

Serial.print("Set the target temperature of the heating layer and the heating time: ");
if(res == true){
Serial.println("set successful!");
}else{
Serial.println("set failure!");
}
}

void loop()
{
static uint8_t calibrated = 0;

#ifdef CALIBRATE_PRESSURE
if(calibrated == 0) {
if(bme.iaqUpdate() == 0) {
/*You can use an accurate altitude to calibrate sea level air pressure.
*And then use this calibrated sea level pressure as a reference to obtain the calibrated altitude.
*In this case,525.0m is chendu accurate altitude.
*/
seaLevel = bme.readSeaLevel(525.0);
Serial.print("seaLevel :");
Serial.println(seaLevel);
calibrated = 1;
}
}
#else
calibrated = 1;
#endif

if(calibrated) {
uint8_t rslt = bme.iaqUpdate();
if(rslt == 0) {
Serial.println();
Serial.print("timestamp(ms) :");
Serial.println(millis());
Serial.print("temperature(C) :");
Serial.println(bme.readTemperature(), 2);
Serial.print("pressure(Pa) :");
Serial.println(bme.readPressure());
Serial.print("humidity(%rh) :");
Serial.println(bme.readHumidity(), 2);
Serial.print("altitude(m) :");
Serial.println(bme.readAltitude());
#ifdef CALIBRATE_PRESSURE
Serial.print("calibrated altitude(m) :");
Serial.println(bme.readCalibratedAltitude(seaLevel));
#endif
Serial.print("gas resistance :");
Serial.println(bme.readGasResistance());
if(bme.isIAQReady()) {
Serial.print("IAQ :");
float iaq = bme.readIAQ();
Serial.print(iaq);
if(iaq < 50) Serial.println(" good");
else if(iaq < 100) Serial.println(" average");
else if(iaq < 150) Serial.println(" little bad");
else if(iaq < 200) Serial.println(" bad");
else if(iaq < 300) Serial.println(" worse");
else Serial.println(" very bad");
} else {
Serial.println("IAQ not ready, please wait about 5 minutes");
Serial.print("IAQ not ready, You will have to wait ");
Serial.print((int)(305000-millis())/1000);
Serial.println(" seconds");
}
}
}
}